Collection of Data
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Define secondary data.

If we are using data which have already been collected by somebody else, it is secondary data.
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    In India the population census is carried out in every :

    • Three years

    • Five years

    • Ten years

    • Ten years

    Answer
    What are the principal sources of data ?
    Answer
    What type of data involves less time and less expenses ?
    Answer
    Define primary data.
    Answer
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